Abstract
In order to improve the fatigue life prediction accuracy of FGH96 material for turbine engine at higher stress gradient notch, such as bolt holes, the new mean stress formula is used in this paper, the effect of stress gradient and size effect are considered at the same time, Fatigue test of FGH96 material inter-stage disc simulation test piece is done, and the parameters in the life prediction equation of the model are fitted. Further study on fatigue test of FGH96 material turbine pin bolt hole simulation unit is done, and test results is compared with the forecast results. The result shows that, the improved fatigue life prediction method has higher accuracy, and the validity of the method is proved.
Highlights
(1 -γ) b ùûúú b ε′f éëêê2Nf æ1 ç è
In order to improve the fatigue life prediction accuracy of FGH96 material for turbine engine at higher stress gradient notch, such as bolt holes, the new mean stress formula is used in this paper, the effect of stress gra⁃ dient and size effect are considered at the same time, Fatigue test of FGH96 material inter⁃stage disc simulation test piece is done, and the parameters in the life prediction equation of the model are fitted
Further study on fatigue test of FGH96 material turbine pin bolt hole simulation unit is done, and test results is compared with the forecast re⁃ sults
Summary
(1 -γ) b ùûúú b ε′f éëêê2Nf æ1 ç è 系数 σ′f 、疲劳强度指数 b、疲劳延性系数 ε′f 及疲劳延 性指数 c。 它不是简单的线性关系, 很难通过线性 E / MPa 185 000 σ′f / MPa 1 536 ε′f / % 11.33 International Journal of Fatigue, 2000, 22(5) : 397⁃409 [4] 姚卫星.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
